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State of Order of the Crosslinker in Main-Chain Liquid Crystalline Elastomers

✍ Scribed by Frank Zander; Heino Finkelmann

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
515 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Rigid anisotropic crosslinkers have been shown to decrease the nematic order and the transition temperatures of main‐chain liquid crystalline elastomers (MCLCEs). In order to look into this phenomenon, the state of order of an anisotropic crosslinker in an MCLCE was investigated separately from that of the matrix. For this purpose, multifunctional perylene derivatives were synthesized and used as a crosslinker and as a reference mesogen probe. Their states of order were measured by their dichroism, and were compared to that of the MCLCE matrix. A systematically lower degree of order was observed for the crosslinker in comparison to the matrix, both when attached to and dissolved in the network.

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Shear Mechanical Properties of Main Chai
Shear Mechanical Properties of Main Chain Liquid Crystalline Elastomers
✍ Daniel Rogez; Holger Brandt; Heino Finkelmann; Philippe Martinoty πŸ“‚ Article πŸ“… 2006 πŸ› John Wiley and Sons 🌐 English βš– 261 KB

## Abstract Summary: The behavior of the complex shear modulus __G__ = __Gβ€²__ + i__Gβ€³__ of a main chain liquid crystalline elastomer film oriented with the director in the plane of the film is investigated for the first time by shearing the film in a direction perpendicular or parallel to the direc